申请人:Ciba-Geigy Corporation
公开号:US05420301A1
公开(公告)日:1995-05-30
The reaction of 2,2-difluorobenzo-1,3-dioxole with (a) an alkali metal or an alkali metal compound and then (b) a compound R.sup.1 -Z.sup.1 in which Z.sup.1 is a leaving group, or with an aldehyde produces compounds of formula I ##STR1## wherein R.sup.1 is --OH, --SH, --CHO, --CN, --COOH, --B(OH).sub.2, --COX, with X being Cl or Br, or is --COOR.sup.2, --SiR.sub.3.sup.2 or --B(OR.sup.2).sub.2, with R.sup.2 being a C.sub.1 -C.sub.12 alcohol moiety without the hydroxy group, wherein R.sup.1 is further --C.sub.n H.sub.2n COOR.sup.2, with n being an integer from 1 to 4, or linear or branched C.sub.1 -C.sub.12 hydroxyalkyl which is unsubstituted or is substituted by --F, --CN, C.sub.1 -C.sub.6 alkoxy, phenyl, fluorophenyl, C.sub.1 -C.sub.4 alkoxy-phenyl, C.sub.1 -C.sub.4 alkylthio-phenyl, C.sub.1 -C.sub.4 alkyl-phenyl, C.sub.1 -C.sub.4 fluoroalkyl-phenyl, nitrophenyl or by cyanophenyl, or wherein R.sup.1 is a benzyl alcohol which is unsubstituted or is substituted by F, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 fluoroalkyl, nitro or by cyano, or is C.sub.1 -C.sub.12 acyl, or wherein R.sup.1 is a radical of formula II ##STR2## wherein R.sup.5 is --CN, --CF.sub.3, --COOR.sup.2, --CONH.sup.2, --CO--NHR.sup.2 or --CONR.sub.2.sup.2, R.sup.3 and R.sup.4 are a direct bond or each is H, or R.sup.3 is H and R.sup.4 independently has the meanings of R.sup.5, or R.sup.3 and R.sup.4 together are --CH.sub.2 --NR.sup.6 --CH.sub.2 --, --CH.sub.2 --NR.sup.6 --CO-- or --CO--NR.sup.6 --CO-- wherein R.sup.6 is the radical of a removable protecting group, or wherein further R.sup.1 is a radical of formula III ##STR3## Insecticides or fungicides can be prepared from the compounds of formula I. 3-(2,2-difluorobenzodioxol-4-yl)-4-cyanopyrrole can be prepared by reacting 4-metallo-2,2-difluorobenzodioxole (III) with an unsaturated nitrile and then with a sulfonylmethyl isocyanide in a one-pot process. The compounds III are novel intermediates.
2,2-二氟苯并-1,3-二噁烷与(a)碱金属或碱金属化合物反应,然后与(b)化合物R.sup.1-Z.sup.1反应,其中Z.sup.1是一个离去基团,或与醛反应,产生式I的化合物
##STR1##
其中R.sup.1是--OH,--SH,--CHO,--CN,--COOH,--B(OH).sub.2,--COX,其中X是Cl或Br,或是--COOR.sup.2,--SiR.sub.3.sup.2或--B(OR.sup.2).sub.2,其中R.sup.2是不带羟基的C.sub.1-C.sub.12醇基,其中R.sup.1还是--C.sub.n H.sub.2n COOR.sup.2,其中n是1至4的整数,或是未取代或被--F,--CN,C.sub.1-C.sub.6烷氧基,苯基,氟苯基,C.sub.1-C.sub.4烷氧基苯基,C.sub.1-C.sub.4烷基硫基苯基,C.sub.1-C.sub.4烷基苯基,C.sub.1-C.sub.4氟烷基苯基,硝基苯基或氰基苯基取代的线性或支链C.sub.1-C.sub.12羟基烷基,或其中R.sup.1是未取代或被F,C.sub.1-C.sub.4烷氧基,C.sub.1-C.sub.4烷基硫基,C.sub.1-C.sub.4烷基,C.sub.1-C.sub.4氟烷基,硝基或氰基取代的苄基醇,或是C.sub.1-C.sub.12酰基,或其中R.sup.1是式II的基团
##STR2##
其中R.sup.5是--CN,--CF.sub.3,--COOR.sup.2,--CONH.sup.2,--CO--NHR.sup.2或--CONR.sub.2.sup.2,R.sup.3和R.sup.4是直接键或各自是H,或R.sup.3是H且R.sup.4独立具有R.sup.5的含义,或R.sup.3和R.sup.4一起是--CH.sub.2--NR.sup.6--CH.sub.2--,--CH.sub.2--NR.sup.6--CO--或--CO--NR.sup.6--CO--,其中R.sup.6是可去保护基的基团,或其中进一步R.sup.1是式III的基团
##STR3##
可以从式I的化合物制备杀虫剂或杀菌剂。通过将4-金属化的2,2-二氟苯并二噁烷(III)与不饱和腈反应,然后与磺酰甲基异腈在一锅法中反应,可以制备3-(2,2-二氟苯并二噁烷-4-基)-4-氰基吡咯。化合物III是新颖的中间体。